grommunio
grommunio (formerly known as grammm) efficiently combines all requirements of modern, digital communication and collaboration.
Best grommunio Alternatives & Competitors in 2025
The best grommunio alternatives based on verified products, community votes, reviews and other factors.
Filter:
4
Open-Source Alternatives.
Latest update:
-
Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.
-
Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.
-
As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more
-
Sharing & communication software for business
-
On-premises, enterprise collaboration solution for documents, emails, calendars and more.
-
A fully fledged, free email server solution, an open source project (GPL v2).
-
Axigen is an integrated email, calendaring & collaboration platform, built on a Linux mail server technology.
-
An open source mailserver suite.
-
Protect mail server against spam, viruses and malware with Proxmox Mail Gateway security for businesses, government, education and non-profit organizations.
-
Google's encompassing suite of cloud-based business apps.
-
Horde Groupware is a free, enterprise ready, browser based collaboration suite.
-
IceWarp integrates all communication & collaboration features in one unified solution.
-
With Nextcloud enterprises host their own secure cloud solution for storage, collaboration & communication from any device, anywhere.
-
Open-Xchange Server 6 is the most advanced Linux based Groupware solution f.
grommunio discussion
